Displacement and Opacity map problem - grill making

Hi all

I’m making a grill from a plane using “tiles” map for the displacement and also for the opacity. So my grill is just a plane with tiles in opacity to make the holes in the plane and get the edges of the grill. So it gives a grid of 10 X 10 square holes in it. Perfect, now we need some thickness to the grill. For this I add displacement using the tiled opacity map. With 3D displacemant mapping I get a grill with chunks eaten out the sides of the edges. With 2D displacement I get a perefect grill but then the opacity map gets ignored and instead of a grill with holes in, I get a grill with black bottom. The map is a tile with black (0,0,0) square and white (255,255,255) edge. I have switched “blur” in the map to 0.01 down from the default of 1 (to get crisp edges)

Any other ideas on how to make the grill? Actual geometry might be too heavy as I have thousands of grills with about 10 variations in size. Maybe 10 different vrayproxies?

Any thoughts?

instead of an opacity map you can use the water level in the displacement modifier properties, even though it should be working with opacity as well.

I’m displacing 60mm. The water level on 0 does nothing. -100 Does nothing. 100 Erases the whole thing. 60 makes it thin as paper WITH holes. less than 60 does nothing.

duh on my part. I had real world mapping with mapscaler. Changed it to normal UV mapping and it worked fine. Would be nice though if you could use real world mapping

When possible, Real geometry is always the way the go…sooo much faster to render.
Do your 10 versions, proxy them up & away you go…and you don’t waste time waiting for displacement anymore which can be very very slow with GI calculations.
I do a lot of test renders tweaking stuff & have found proxys save me a lot of time by the end.

Note** also if you use Vray RT you will see the proxies but not any displacement, as it’s not supported yet

Cheers

yes I’ve decided to go the proxy route. I can use lower render settings this way and still get good result